ym_wang_pnw's Identifications

Growing from duff in pile of woody debris in mixed conifer/hardwood forest near Lake Valley Reservoir, Tahoe NF
Cespitose clusters with white rhizomorphs tenaciously holding onto substrate. Tomentose stipe base, white lamellae.
Smell sweet with notes of cinnamon or warming spices
Taste sweet

Voucher collection 10534dll consists of a solitary mushroom that was collected on 14 November 2021 on the edge of path in grass, moss, and redwood branchlet humus with an overstory of 15-25 year Coast Redwood Trees. The microscopic features of 10534 were studied and a summary description follows. The ITS sequence of this was this collection was prepared and reported by Sharon Squazzo.
Description of the Microscopic Features of 10534dll
Basidiospores 4–6 angled, always rhomboid when 4-angled, angels distinct, hilum small and therefore not distinct, spore apex acute or obtuse, about 50% of the spores with a single droplet, isodiametric to heterodiametric in profile view, on the average isodiametric, 7.0–9.5 × 5.5–8.5 μm (xavg = 8.2 × 7.2 μm; Q = 1.0–1.35; Qavg = 1.15 ± 0.1; n = 45).
Basidia clavate and tapering to a narrow base, not separable when crushed, when mature with abundant large granules, 35.5–44.0 × 9.0–13.0 μm (xavg = 40.5 × 10.9 μm; Q = 3.2–4.6; Qavg = 3.76 ± 0.4; n = 16); 2 or 4 sterigmate, sterigma very slender..
Gill Edge sterile; Cheilocystidia observed from gill sections and full gill mounts, abundant, colorless, versiform (aculeate, subulate, obclavate, clavate, fusiform, lageniform, rostrate ventricose) often projecting beyond the hymenium, colorless, 17.5–87. 5 × 5.0–30.0 μm (xavg = 47.8 × 12.1 μm; Q = 1.7–7.5; Qavg = 4.19 ± 1.61; n = 30).
Pleurocystidia scattered to abundant, colorless, project beyond the hymenium and similar in shape to the cheilocystidia, 27.0–60.0 × 7.0–18.0 μm (xavg = 48.5 × 12.3 μm; E = 2.9–6.9; Qavg = 4.33 ± 1.52; n = 10).
Pileipellis a tightly entangled layer of hyphae on the pileus disc, composed of numerous semi-erect to somes erect, tightly entangled hyphae with the terminal 1 to 5 cells slightly inflated and with a dark brown intracellular pigment in 3% KOH, elsewhere these hyphae are prostrate towards the margin ; Pileocsytidia cylindric, cylindrical, clavate, or fusiform, 14.0–57.0 × 2.0–11.0 μm (xavg = 30.8 × 6.10 μm; Q = 2.8–10.5; Qavg = 5.52 ± 2.3; n = 20)
Stiptipellis in longitudinal sections of the stipe apex consists of layer of colorless hyphae composed inflated, semierect to erect caulocystidia; elsewhere the caulocystidia are absent, the layer of 2 to 4 hyphae are prostrate and the terminal cells are cylindric; Caulocystidia cylindric, cylindrical, or clavate and measure 37.0–77.0 × 8.0–24.0 μm (xavg = 49.1 × 16.0 μm; Q = 1.5–4.9; Qavg = 3.33 ± 1.00; n = 10).
Clamp connections present on base of the basidia and basidioles; one septum in the hyphae of the pileus one large clamp connections; absent in all other tissues.
Pigment in Pileipellis and Pileocystidia dark brown, intracellular, and in 3% KOH the form of variable sized clots.
Oleiferous Hyphae abundant in the pileus, lamellar, and stipe tramas.
Basidia with abundant granules when mature.

Comments: The distinctive features of 10534 are the colors of the basidiomata, the small basidiospores length less than 10 μm and on the average are isodiametric, the distinct cheilocystidia, pleurocystidia and caulocystidia, the unusal pileus disc which is not tomentlose but layer of colored hyphae and is very finely fibrillose elsewhere, the pileipellis that is an entangled layer of hyphae and the pruinose stipe apex, and its clamp connections.
In my 1994 book, this voucher collection belongs to section Rhombisporus of genus Inocephalus because it rhomboid shaped basidospores. 10534 is somewhat similar to Inocephalus cremeoluteus Largent because size and shape its rhomboid basidiospres. However, Inocephalus cremeoluteus is different than 10534 because of its creamy yellow pileus, creamy yellow stipe, pileipellis that is a cutis, its lack of caulocystidia, and its association with oaks.
The ITS sequence of 10534 indicates it belongs to a complex around Entoloma rhombisporum and matches that of Inaturalist 29454409 and indicates that 10534 is not part of the complex Entoloma subgenus Leptonia or Cyanula

Spores 11.25-20 x 5-7.5 microns, but most in the 11.25-15 x 5 range. Paraphyses far more abundant than asci. Compared to https://mushroomobserver.org/132887?q=1gjJW

Found on branch in mountain stream. Also had Cudoniella clavus and Vibrissea flavovirens on the same log.

Fruiting beneath Douglas fir.

• Note the two tiny spiders(Zygiella x-notata) hanging out on gills of each specimen in upturned/gill view field shots.
  Odor: strong green corn husk.
  Cap: conical when young, abruptly umbonate at maturity. Silky, radially striate cap. Metallic sheen in sunlight(dry specimens).
  Stem: thick, scaly with dense chevrons at apex.
  Harvested 4 specimens.
  Removed single gill from a single cap and mounted in 3% KOH on glass slide.
  MICROSCOPY:
  Spores: smooth, ellipsoid to potato shaped, medium sized.
  Cystidia: no metuloids visible in this collection. Cystidia analyzed were clavate and slightly roughened.
  Basidia: 4 and 2 sterigmate.
  Dehydrated all specimens thoroughly and bagged for herbarium collection/genetic record.
  My corresponding Mushroomobserver observation linked below-

https://mushroomobserver.org/551256?q=1oaSB

Fruiting beneath Douglas fir.

• Note the two tiny spiders(Zygiella x-notata) hanging out on gills of each specimen in upturned/gill view field shots.
  Odor: strong green corn husk.
  Cap: conical when young, abruptly umbonate at maturity. Silky, radially striate cap. Metallic sheen in sunlight(dry specimens).
  Stem: thick, scaly with dense chevrons at apex.
  Harvested 4 specimens.
  Removed single gill from a single cap and mounted in 3% KOH on glass slide.
  MICROSCOPY:
  Spores: smooth, ellipsoid to potato shaped, medium sized.
  Cystidia: no metuloids visible in this collection. Cystidia analyzed were clavate and slightly roughened.
  Basidia: 4 and 2 sterigmate.
  Dehydrated all specimens thoroughly and bagged for herbarium collection/genetic record.
  My corresponding Mushroomobserver observation linked below-

https://mushroomobserver.org/551256?q=1oaSB